docs: def list_topic(self, k, Nwords=10):
          """
          List the top ``topn`` words for topic ``k``.
  
  
          Examples
          --------
  
          .. code-block:: python
  
             >>> model.list_topic(1, Nwords=5)
             [ 'opposed', 'terminates', 'trichinosis', 'cistus', 'acaule' ]
  
          """
  
          return [(self.vocabulary[w], p) for w, p
                  in self.phi.features[k].top(Nwords)]